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Practical Single-Image Super-Resolution Using Look-Up Table

CVPR 2021 · Image generation › Super-resolution · approach: Real-world super-resolution · 77 citations (OpenAlex)

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Measured effects reported in the paper

What was changedWhereMeasuredEffect
Replace bicubic interpolation with SR-LUT Ours-VSingle-image ×4 super-resolution · Set5PSNR: 28.42 -> 29.22Helped
Replace bicubic interpolation with SR-LUT Ours-FSingle-image ×4 super-resolution · Set5PSNR: 28.42 -> 29.77Helped
Replace bicubic interpolation with SR-LUT Ours-SSingle-image ×4 super-resolution · Set5runtime: 60ms -> 91msHurt
Use Ours-V instead of bicubic interpolationSingle-image ×4 super-resolution · Samsung Galaxy S7, 1280 × 720 outputruntime: 60ms -> 15msHelped
Use Ours-F instead of bicubic interpolationSingle-image ×4 super-resolution · Samsung Galaxy S7, 1280 × 720 outputruntime: 60ms -> 34msHelped
Add rotational ensemble training (ablation)Ours-S · Set5PSNR: 28.32 -> 29.82Helped
Use an asymmetric 1 × 3 kernel instead of a symmetric 1 × 3 kernel (ablation)SR-LUT · Set5PSNR: 27.75 -> 29.77Helped
Expand the receptive field from size 2 to size 3 (ablation)SR-LUT · Set5PSNR: 29.22 -> 29.77Helped
Increase sampling interval from 24 to 25 (ablation)Ours-S · Set5PSNR: 29.82 -> 29.62Hurt
Increase sampling interval from 24 to 26 (ablation)Ours-S · Set5PSNR: 29.82 -> 29.18Hurt

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